<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            margin: 0;
            padding: 0;
        }
        html,body{
            height: 100%;
        }
        header,footer{
            height: 50px;
            line-height: 50px;
            text-align: center;
            background: orange;
        }
        section{
            height: calc(100% - 100px);
        }
        nav,aside{
            width: 100px;
            height: 100%;
            background: #ccc;
            float: left;
        }
        main{
            float: left;
            height: 100%;
            width: calc(100% - 200px);
            background: white;
        }
        aside p{
            font-size: 12px;
        }
        main .article1{
            height: 60%;
        }
        main .article2{
            height: 40%;
        }
    </style>
</head>
<body>
    <!-- <div class="header"></div>
    <div class="body"></div>
    <div class="footer"></div> -->
    <header>header顶部</header>
    <section>
        <nav>
            <figure>nav</figure> <!-- figure普通的标签,没有任何特性 -->
            <ul>
                <li>111</li>
                <li>111</li>
                <li>111</li>
                <li>111</li>
            </ul>
        </nav>
        <main>
            <!-- article上下文无关的独立的内容 -->
            <article class="article1">
                <header>article-header</header>
                <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Iusto perferendis culpa inventore illo rerum, obcaecati quae qui debitis libero consequatur commodi impedit ipsum error ipsam a accusamus vitae exercitationem earum!</p>
                <footer>article-footer</footer>
            </article>
            <article class="article2">
                <header>article-header</header>
                <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Iusto perferendis culpa inventore illo rerum, obcaecati quae qui debitis libero consequatur commodi impedit ipsum error ipsam a accusamus vitae exercitationem earum!</p>
                <footer>article-footer</footer>
            </article>
        </main>
        <aside>
            <figure>Aside</figure>
            <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Corporis delectus deserunt maiores ad esse saepe veniam sit adipisci aut cupiditate. Ratione voluptas illo hic quo reiciendis minima. Veritatis, perferendis explicabo!</p>
        </aside>
    </section>
    <footer>footer底部</footer>
</body>
</html>